feat: Add linker support to GridWidgetPlugin

[mattrunyon]

This adds support for linker to GridWidgetPlugin so if you have tables within a dh.ui component (like 2 tables in a flex), you can link with them.

Cannot use ui.table yet (the hook from this should make it easy to implement). Also will not draw the link to the tab when hidden without a PR for dh.ui to add the panelId context.

Not going to add chart in this PR because there is a lot of code in ChartPanel that actually handles all of the linker interactions.

[codecov]

Codecov Report

Attention: Patch coverage is 30.91787% with 143 lines in your changes missing coverage. Please review.

Project coverage is 47.22%. Comparing base (5edf3b3) to head (7057bd7).

Files with missing lines	Patch %	Lines
...kages/dashboard-core-plugins/src/linker/Linker.tsx	8.75%	73 Missing ⚠️
...ckages/dashboard-core-plugins/src/useGridLinker.ts	39.06%	39 Missing ⚠️
...ashboard-core-plugins/src/panels/IrisGridPanel.tsx	0.00%	13 Missing ⚠️
...s/dashboard-core-plugins/src/panels/ChartPanel.tsx	10.00%	9 Missing ⚠️
...rd-core-plugins/src/panels/DropdownFilterPanel.tsx	0.00%	5 Missing ⚠️
...d-core-plugins/src/linker/LinkerOverlayContent.tsx	60.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2459      +/-   ##
==========================================
- Coverage   47.25%   47.22%   -0.04%     
==========================================
  Files         727      729       +2     
  Lines       39787    39896     +109     
  Branches     9955     9981      +26     
==========================================
+ Hits        18800    18839      +39     
- Misses      20976    21046      +70     
  Partials       11       11              

Flag	Coverage Δ
unit	47.22% <30.91%> (-0.04%)	⬇️

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